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Analog Devices Inc. AD574AJP-REEL
- Part No.:
- AD574AJP-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
AD574AJP-REEL.pdf
- Description:
- IC ADC 12BIT W/REF/CLK 28-PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,022
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Product details
Overview
AD574AJP-REEL from Analog Devices is a monolithic 12-bit successive-approximation analog-to-digital converter (ADC) with on-chip reference, clock, and three-state data output buffers. It delivers ±1/2 LSB linearity error over 0°C to +70°C, supports unipolar (0 V to +10 V or 0 V to +20 V) and bipolar (±5 V or ±10 V) input ranges, and achieves 35 µs max 12-bit conversion time - used in precision industrial data acquisition, test equipment, and process control systems where high DC accuracy and self-contained architecture are critical.
For engineers reviewing the AD574AJP-REEL datasheet, AD574AJP-REEL pinout, AD574AJP-REEL application, or AD574AJP-REEL equivalent, this page provides verified technical context, confirmed pin functions, real-world application mappings, and validated alternative options for system-level design and sourcing decisions.
Technical Context
The AD574AJP-REEL integrates a temperature-compensated buried Zener reference (10.00 V ±0.2%), internal 12-bit current-output DAC, comparator, successive-approximation register (SAR), and digital control logic - eliminating need for external timing or reference components. Its dual-mode operation (12-bit or 8-bit conversion) is controlled via AO and 12/8 pins, with STS flag signaling conversion status.
Digital interface uses CE/CS/R/C control protocol compatible with microprocessor buses; data output is left-justified and configurable as 12-bit parallel or two 8-bit nibbles. Input impedance is 5 kΩ (10 V span) or 10 kΩ (20 V span), requiring low-impedance driving sources or sample-and-hold amplifiers like the AD585 for dynamic signals above 1.5 Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete digital codes across full-scale range. |
| Linearity Error (TMIN–TMAX) | ±1/2 LSB - guarantees monotonicity and no missing codes over full 0°C to +70°C range. |
| Conversion Time | 35 µs max (12-bit) - enables sampling rates up to ~28.5 kSPS in burst mode with external timing control. |
| Reference Voltage | 10.00 V ±0.2% - internally generated, stable over temperature, supplies 1.5 mA to external loads. |
| Analog Input Ranges | Unipolar: 0 V to +10 V or 0 V to +20 V; Bipolar: ±5 V or ±10 V - selectable via pin strapping without external resistors. |
| Power Supply Range | VLOGIC = +4.5 V to +5.5 V; VCC = +11.4 V to +16.5 V; VEE = –11.4 V to –16.5 V - supports ±12 V or ±15 V operation. |
| Full-Scale Calibration Error | 0.125% of FS max - trimmable to <±2 LSB typical using external 50 Ω resistor between REF OUT and REF IN. |
Pinout & Package
AD574AJP-REEL is supplied in a 28-lead plastic leaded chip carrier (PLCC, package code P-28A), surface-mount compatible with standard reflow profiles. The package features gull-wing leads, JEDEC MO-047A outline, and thermal pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | Digital Common (DC) | Ground reference for logic supply and digital interface; must be tied to system digital ground. |
| 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 | DB11–DB0 (Data Outputs) | Three-state parallel outputs delivering 12-bit conversion result; DB11 = MSB, DB0 = LSB. |
| 14 | STS (Status) | Active-high signal indicating conversion in progress; goes low when result is ready and stable. |
| 16 | CE (Chip Enable) | Primary enable for read/convert operations; falling edge initiates action when CS and R/C are valid. |
| 17 | CS (Chip Select) | Secondary enable; must be low during CE assertion for valid command execution. |
| 18 | R/C (Read/Convert) | Low = start conversion; High = enable data output buffers; controls function mode with CE/CS. |
| 19 | A0 (Byte Address) | Selects 12-bit vs. 8-bit conversion; also selects MSB nibble (A0=0) or LSB nibble (A0=1) during read. |
| 20 | 12/8 | Configures data format: tied to VLOGIC = 12-bit word; tied to DC = two 8-bit bytes. |
| 21 | REF OUT | 10 V reference output; supplies internal DAC and external circuitry; load must remain constant during conversion. |
| 22 | REF IN | Reference input node; connected to REF OUT via 50 Ω resistor for full-scale calibration trim. |
| 23 | BIP OFF | Bipolar offset adjustment point; grounded for unipolar mode, tied to REF OUT for bipolar mode. |
| 24 | 10VIN | 10 V span analog input; used with 5 kΩ internal resistor for 0 V to +10 V or ±5 V operation. |
| 25 | 20VIN | 20 V span analog input; used with 10 kΩ internal resistor for 0 V to +20 V or ±10 V operation. |
| 26 | ANA COM (AC) | Analog common - reference for analog inputs, internal reference, and bipolar offset; must be isolated from digital noise. |
| 27 | VCC | Positive analog supply (+12 V or +15 V); powers internal DAC, comparator, and reference. |
| 28 | VEE | Negative analog supply (–12 V or –15 V); required for bipolar operation and internal circuit biasing. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 10 V reference | Eliminates need for external precision reference; ±0.2% initial accuracy and <50 ppm/°C drift over temperature. |
| Self-contained SAR architecture | Requires no external clock, DAC, or comparator - reduces BOM count and layout complexity in embedded systems. |
| Configurable 12-/8-bit operation | Reduces conversion time to 24 µs (8-bit) for lower-resolution applications while maintaining pin compatibility. |
| Three-state parallel data bus | Enables direct connection to 8-bit or 16-bit microprocessor data buses without external latches or transceivers. |
| Adjustable unipolar/bipolar offset & gain | Allows field calibration to meet system-level accuracy targets using two external trimmers (R1, R2). |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous monitoring of 4–20 mA loop sensors converted to digital via precision voltage scaling in PLC analog input modules. IC Role / Device Role / Timing Role: Primary ADC capturing slow-varying sensor voltages (e.g., temperature, pressure) with DC stability and minimal calibration drift. Use Value: ±1/2 LSB linearity ensures accurate representation of small analog changes across full 0°C to +70°C operating range without recalibration. | Use Scenario: Digitizing calibrated reference signals during functional testing of DUTs in benchtop ATE racks. IC Role / Device Role / Timing Role: High-accuracy front-end ADC interfaced to microcontroller for pass/fail threshold comparison against known standards. Use Value: On-chip 10 V reference and guaranteed no-missing-codes behavior eliminate external reference errors and ensure deterministic code mapping. |
| Medical Instrumentation | Avionics Sensor Interface |
Use Scenario: Converting biopotential signals (ECG, EEG) amplified by low-noise instrumentation amps into digital domain for analysis. IC Role / Device Role / Timing Role: Precision DC-coupled ADC stage accepting buffered analog inputs within ±5 V range, synchronized to system controller. Use Value: Bipolar offset trim capability allows precise nulling of amplifier DC offsets before digitization, preserving dynamic range. | Use Scenario: Interfacing legacy analog transducers (e.g., fuel level, hydraulic pressure) in retrofit avionics displays requiring MIL-qualified signal conditioning. IC Role / Device Role / Timing Role: Ruggedized ADC handling wide input spans (±10 V) and surviving extended temperature excursions in non-pressurized bays. Use Value: Internal thin-film resistor matching and ±1/2 LSB linearity maintain traceable accuracy across flight envelope without periodic recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7874KNZ | 12-bit, 100 kSPS throughput, serial SPI interface, external reference required. | Suitable for space-constrained designs needing lower power and digital isolation; lacks integrated reference and parallel bus. | Select when system already uses SPI infrastructure and external reference is available; not drop-in for AD574AJP-REEL's parallel interface or self-contained architecture. |
| MAX197BCNI+ | 12-bit, 100 kSPS, internal reference (4.096 V), software-configurable input ranges, 24-pin SOIC. | Offers programmable range selection and auto-calibration; lower supply voltage (±5 V), no ±12/±15 V support. | Prefer for new designs targeting single-supply operation and flexible range configuration; requires PCB redesign due to different pinout and voltage requirements. |
Compared with AD7874KNZ and MAX197BCNI+, the AD574AJP-REEL provides guaranteed ±1/2 LSB linearity with integrated 10 V reference and parallel interface - making it optimal for legacy industrial systems requiring minimal component count, proven long-term stability, and direct microprocessor bus integration without protocol translation.
Availability
AD574AJP-REEL is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, medical instrumentation, and avionics sensor interface applications requiring stable component supply across extended product lifecycles.
Supply support for AD574AJP-REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The AD574A belongs to Analog Devices' legacy precision ADC product line, designed specifically for high-accuracy, low-drift industrial and instrumentation applications where self-contained architecture and DC performance outweigh speed requirements.
FAQ
What is the operating temperature range for the AD574AJP-REEL?
The AD574AJP-REEL is rated for operation from 0°C to +70°C. This commercial-grade temperature specification applies to the J-grade device in PLCC packaging, and all electrical parameters - including ±1/2 LSB linearity error and 10.00 V reference stability - are guaranteed across this full range. The AD574AJP-REEL does not support extended or military temperature grades.
Does the AD574AJP-REEL require external components to operate?
No, the AD574AJP-REEL is a complete 12-bit ADC requiring no external clock, DAC, comparator, or reference. Only power supplies (+5 V, +12/+15 V, –12/–15 V), analog input connections, and control signals (CE, CS, R/C, A0, 12/8) are needed. External 50 Ω resistor is optional for full-scale calibration trim, and trimmer potentiometers are optional for offset/gain adjustment - but not required for basic operation.
How is the AD574AJP-REEL configured for bipolar versus unipolar input ranges?
The AD574AJP-REEL selects input range via hardware connections: for unipolar mode, BIP OFF (Pin 23) is grounded and 10VIN (Pin 24) or 20VIN (Pin 25) is used; for bipolar mode, BIP OFF is tied to REF OUT (Pin 21), enabling ±5 V or ±10 V spans. No software or register writes are involved - configuration is purely pin-strapped and fixed at power-up.
Can the AD574AJP-REEL interface directly to an 8-bit microprocessor bus?
Yes, the AD574AJP-REEL supports 8-bit bus interfacing via its 12/8 and A0 pins. When 12/8 is tied to Digital Common, data appears as two consecutive 8-bit words; A0 selects whether DB11–DB4 (MSB byte) or DB3–DB0 plus four trailing zeros (LSB byte) are enabled. This eliminates need for external latches or data-width converters in 8-bit systems.
What is the maximum recommended analog input frequency for accurate 12-bit conversion with the AD574AJP-REEL?
Without a sample-and-hold amplifier, the AD574AJP-REEL maintains 12-bit accuracy only for input signals changing less than ±1/2 LSB (2.44 mV for 10 V span) during its 35 µs conversion time - limiting usable bandwidth to ~1.5 Hz. For higher frequencies, Analog Devices recommends pairing the AD574AJP-REEL with the AD585 SHA to achieve accurate digitization up to 26 kHz.
AD574AJP-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD574AJP-REEL FAQ
1.How can I place an order for AD574AJP-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD574AJP-REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD574AJP-REEL reliable?
The price and inventory of AD574AJP-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD574AJP-REEL is usually 5 days.
3.What payment methods are accepted for AD574AJP-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD574AJP-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD574AJP-REEL?
AD574AJP-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD574AJP-REEL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD574AJP-REEL?
For technical support, including AD574AJP-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD574AJP-REEL requirements.
6.How does Aetrix verify that AD574AJP-REEL is sourced from the original manufacturer or authorized distributors?
All AD574AJP-REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD574AJP-REEL meets industry standards.
7.What is the process for return or replacement of AD574AJP-REEL?
All AD574AJP-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD574AJP-REEL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD574AJP-REEL part is unused and in its original packaging.
Return procedure for AD574AJP-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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